Receiver Protection in Full-Duplex Self-Interference Measurement
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Solution Overview
Problem
Current wireless communication systems face challenges in detecting and mitigating potential damage to receivers during self-interference measurement procedures, which can lead to equipment damage due to high transmit power levels, especially in full-duplex communications where simultaneous transmission and reception occur on the same frequency range.
Innovation Solution
The system employs self-interference measurements to detect conditions indicating potential damage and reduces either the transmit power of uplink reference signals or the receiver functionality to prevent damage, using techniques such as gradually increasing transmit power and adjusting antenna beam pairs for sufficient separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high transmit power is used for uplink reference signals during self-interference measurement, then measurement accuracy is improved, but receiver damage risk increases
Solution Approach 1:
The system performs preliminary actions by measuring downlink reference signal received power (RSRP) before the actual self-interference measurement. Based on this preliminary measurement, the system calculates a safe transmit power level that ensures accurate measurement while preventing receiver damage. The downlink RSRP measurement serves as a precursor to determine appropriate uplink transmit power settings.
Solution Approach 2:
The system implements feedback mechanisms where the measured downlink RSRP is fed back to the processor, which then uses this information to adjust the uplink reference signal transmit power. This closed-loop feedback ensures that the transmit power is continuously optimized based on actual channel conditions, maintaining both measurement accuracy and receiver safety.
2Productivity
If simultaneous transmission and reception occur on the same frequency range, then full-duplex communication efficiency is improved, but self-interference damage to receiver increases
Solution Approach 1:
The system changes the transmit power parameter dynamically based on measured channel conditions. By adjusting the uplink reference signal transmit power according to the measured downlink RSRP, the system enables full-duplex operation at safe power levels that prevent receiver damage while maintaining communication efficiency.
Solution Approach 2:
The system applies partial action by using a calculated safe transmit power level that is less than the maximum possible transmit power but sufficient for accurate measurement. This partial power application ensures that full-duplex communication can proceed without causing receiver damage from excessive self-interference.
3Reliability
If transmit power is reduced to protect receiver, then receiver safety is improved, but measurement accuracy deteriorates
Solution Approach 1:
The system dynamically changes the transmit power parameter based on the measured downlink RSRP. The processor calculates an optimal transmit power level that is high enough to ensure accurate self-interference measurement while low enough to prevent receiver damage. This adaptive parameter adjustment resolves the contradiction between safety and accuracy.
Solution Approach 2:
The system performs preliminary downlink RSRP measurement to determine the appropriate uplink transmit power level before actual measurement occurs. This preliminary action enables the system to set the transmit power optimally in advance, ensuring both receiver safety and measurement accuracy from the start.
Data Source
AI summary
Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for detecting the possibility of damage to a receiver during a self-interference measurement procedure and taking action to avoid or mitigate such damage.